Improved machine for boring hubs



G. T. PEARSALL & SQA. GARRISON. MACHINE FOR BORING HUBS.

No. 36,573. Patented Sept. 30, 1.862.

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tion of a portion ofthe some, taken in theline of the standards of theframe A and into B, as

UNITED STATES PATENT OFFICE.

G. T. PEARSALL, OF APALAGHIN, AND S. A. GAR-RISON, OF UNlON, NEW YORK.

IMPROVED MACHINE FOR BORING HUBS.

To all whom it may concern.-

Be it known that we, G. T. 'PEARsALL, of Apalachin, in the county ofTioga and State of New York, and S. A. GA'RRISON, of Union, in thecounty of Broorne and State of New York, have invented a new andImproved Machine for Boring Hubs; and we do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, making a part of thisspecification, in which Figure 1 is an elevation of our invention. Fig.2 is a vertical section of the same, taken in the line as m, Fig. 2.Fig. 3 isa vertical secy y, Fig. 1.

Similar letters of reference indicate corresponding parts in thesevcral'figures.

Thisinvention relatesto anew and improved machine for boring the hubs ofcarriage-wheels to receive their boxes.

The object of the invention is to obtain a machine for the purposespecified which will perform the work expeditiously and in a per-' feetmanner, and with a greater or less taper, as may be required.

To this end the invention consists in the employment or use of a hingedframe provided with a gage for the purpose of admitting the wheel to beaccuratelycentered thereon, in connection with a'self-adjusting nut andadjustable'bearing, all arranged in such a manner asto effect thedesired result.

A represents a fixed or permanent frame, which may be constructed in anyproper manner, and B is a frame which is attached to the upper end ofthe frame A by hinges a, so arranged as to admit of the frame B beingturned over in a horizontal position relatively with the frame A whendesired. The face side of the frame B is provided with projecting armsa, for the convenience of securing the wheel 0 to it, which is done bymeans of screws I), passing through any of the parts of the wheel- Theframe B, when in an upright position, is secured by a pin, 0, whichpasses through one shown in Fig. 1. To the frame B there is attached ametal frame, 0, composed of two parallel rods or bars, at (2, connectedat their outer ends by an annular plate, e, and connected near theirinner ends by an annular plate,f. If the frame 0' be of cast metal, therods or bars 11 d and the annular plates 6 f may all be cast in onepiece. I The plate f has rather a small opening, g, at its centerconsiderably smaller than the opening h of plate e, and the formeropening, 9, is at the center of a semispherical projec-' tion, t, whichforms one half of'a socket, j, the

other half of which is formed by screwing an annular plate, It, incontact with f, said plate being provided with a projection, Z, like i,but havinga reverse position, so as to give a spherical form to thesocket j, as shown clearly in i Fig. 2.

D is a screw which-passes through the openings at the centers of theplates fk,and through a nut, E, which is fitted in the socket j, and

has type-metal or other soft metal or composition cast around it withinthesocketj. This external case, which is cast around the nut and isdesignated by j", gives a spherical form to the latter, corresponding tothat of the socket j. This nut is allowed to oscillate or work in thesocket, but not allowed to turn therein, it being prevented from sodoing in' consequence of a projection, 70, whichis cast on it, fittingin a recess, Z, between the plates f k, and adjoining the socket j. (SeeFig. 2.) The screw Dis not entirely cylindrical. It has four planesurfaces, at, extending its whole length at equal distances apart. Inone end of the screw D a bit or cutter, F, is attached and securedfirmly by a screw, it, and on the opposite end of the screw there isfitted a crank, G.

H represents a circular rotating head or disk which is composed of twoannular plates, 0 p, fitted in the center of the annular plate 3 of themetal frame 0'. The inner plate, 0, of this disk abuts against ashoulder, q, in the inner side of plate 0, said shoulder being formed byan annular recess or'rabbet made in said plate around the opening at theinner side of the plate e. (See Fig. 2.) .The periphery of the outerplate, 1), is beveled and fits in the outer part of the opening of platee, which is also beveled, as shown at q in Fig. 2. These two plates 0 pare connected by screws 0', and by screwing up the screws 1" may be fitted in the plate 6, so as to avoid all play or casual movement. saidresult being attained by are not parallel therewith.

has an oblong slot or opening, t, made in it for the screw D topassthrough. This slot or openingt has an oblique position in the slide-I-'that is to say, the slide I has parallel sides and the sides of theslot or opening it (See Fig. 1.) The slideI is fitted between guides iattached to the plate 1), and is allowed to more freely between them,and is secured at any desired point within the scope of its movement bya set-screw, it. In consequence of this obliquity of the slot or opening15 with the sides .of the slide I it will be seen that as the latter ismoved the screw Dwill be shifted or moved in the openings of the plates0 p, and a greater or less obliquity of the screw D with the axis of thewheel 0 may be obtained. This obliquity of the screw D with the hub oraxis of the wheel will give a taper form to the hole bored in the hub ofthe wheel, and in order to obtain any precise taper the slide I may havea scale, a", engraved on it to obtain and facilimm the exact adjustmentof the screw. The plane surfaces at on the screw D insure. the

turning of thehead or disk H with the screw, and the latter is fed toits work by the nut E in the socket), the spherical soft-metalcasingcylindricalcase is a very economical arrangement, as a true exterior isobtained ata trifling expense. In consequence of havingthe frame Battached to the frame A by hinges the securing of the wheel 0 to B isgreatlyfacilitated, as the frame B may be turned over in a horizontalposition and, the wheel 0 secured to it and the frame B then turned andsecured in an upright working position, the face of the frame B to whichthe wheel is attached being provided with a gage, a (see dotted lines,Fig. 1,) to insure the properadjustmentof the wheel to said frame.

We do not claim, broadly, an adjustable rotating screw provided with acutter for bore ing taper holes in hubs, for that is an old device; buti We do claim as new and desire to-secure by Letters Patent- I 1. Thesecuring of the wheel 0 to-a supplemental frame, B, containingthe-working parts of the machine, which frame is attached to the fixedframe A when the latter is in a horizontal position, as and for thepurpose specified.

2. The nut E, provided with anexternal spherical case, j", of soft metalcast around it, inconnectionwiththesphericalsocketjfiormd in or betweenthe plates f k, the case j" and nutE being prevented from turning in thesocket j by a projection, k, substantially as herein set forth.

3. The disk or head H, formed of the two plates 0 p, fitted in the plateeof the frame 0, in connection with the slide I, screw D, and nut E, allarranged for joint operation, as and for the purpose herein set forth. 1

' G. T. PEARSALL.

S. A. GABRISON. Witnesses: v

JOHN S. .GILES,

GEORGE COOPER.

